Finding the Fourth Proportional to 2,310.42, 3,188.45 and 1,315.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,310.42 : 3,188.45 = 1,315.54 : x
2. Step 2: Convert to fraction form
   2,310.42/3,188.45 = 1,315.54/x
3. Step 3: Cross multiply
   2,310.42x = 3,188.45 × 1,315.54
4. Step 4: Simplify right side
   2,310.42x = 4,194,528.83
5. Step 5: Solve for x
   x = 4,194,528.83/2,310.42
6. Step 6: Final answer
   x = 1,815.48